Why:
Onboarding new developers
Remembering how to continue work on the project yourself

What to include:
- Who has contributed, their contact details, etc
- What dependencies the project has, e.g. imagemagick, postgres, etc
- How to get the project bootstrapped and ready for development locally
- How to deploy the project into production
- Running tests
- Third party services
- How to contribute/features (this probably should belong in a different file)
- Build status etc
- Overview of the project, what is trying to achieve, etc.